Upwork is one of the well-known Freelancing platforms worldwide. You may wonder how to use this platform if you are a client or a freelancer who’s not a native speaker or looking for a multilingual platform. Upwork draws users from around the globe, and many prefer to collaborate in languages other than English.
English is the official language of Upwork. According to the article community in Upwork, Job posting and Proposals and Messages can be in a different language, but it is better in English since it is the only officially supported language on Upwork; certain characters in other languages may display incorrectly.
Further information
How to add multilingual language Upwork profile
https://support.upwork.com/hc/en-us/articles/360016144974
Writing proposals in other languages
https://bit.ly/3otY3hk
Preferred languages except of English
https://bit.ly/3ouQ3wN
https://bit.ly/3uxWRgY